The HALO can also detect when vaping has been masked by spraying another substance, such as a deodorant, to cover up the smell of cannabis or other vaping smells. A dynamic vape detection algorithm is used by the HALO to learn about the environment and alert when vaping is detected.

Yes, aerosol deodorants and body sprays can frequently trigger "false positives" in modern vape detectors. These devices, commonly installed in school bathrooms and public spaces, work by using sophisticated sensors to detect particulate matter (PM), humidity changes, and specific chemical compounds like nicotine or propylene glycol. Because aerosol sprays release a high concentration of fine liquid droplets and chemical propellants into the air, they can mimic the "particulate signature" of a vape cloud. Some advanced sensors are now designed with "dual-detection" technology to distinguish between tobacco smoke, THC, and common aerosols, but many standard models will still sound an alarm if a large amount of spray is used in a confined area. This is why many institutions advise against the use of heavy perfumes or sprays near detection units to avoid unnecessary disciplinary investigations or maintenance alerts.